an allison tranny can handle hp over stock before internal damage occurs just like the ford and dodge trannys they all have the same issues what i find hilarious is when guys tell me its the same transmission they use in the abrahms tank and i have to tell them that no its got the same sticker as the transmission from the abrahms tank but they are two completely different animals they might be designed and manufactured by the same company but they are not the same its just like yamaha they make keyboards and motorcycles among many any other things but that doesnt mean they are the exact same quality